Pigmented macular lip lesion Clinical Advisor About Moles Types, Warning Signs, Causes, and Prevention An acral nevus is a benign melanocytic lesion found on the palms and soles. Dermoscopically, it most commonly shows the parallel furrow pattern, where pigmentation follows the furrows of the skin markings. Melanocytic Lesions Basicmedical Key Congenital Melanocytic Nevus: Causes, Symptoms, and Treatment